Treatment of materials



Patented ay M, 1937 2,079,604 TREATMENT OF MATERIALS William Alexander Dickie and E Greenwood, Spondon, near Derby, signers to ilelanese E corporation of Delaware No Drawing. Application May 28,

No. 540,802. In Great Britain August 8,

i. @laim.

, This invention relates to the treatment of materials and more particularly to the formation of efiects on yarns, fabrics, films and like materials made of or containing organic derivatives of cellulose.

In U. S. Patent No. 1,780,645 to Camille Dreyins and William R. Blame, entitled "Improvements in ornamental fabric and method of making the same, processes for the production of matt effects upon fabrics made of or containing organic derivatives of cellulose are described, wherein the materials are treated with effect compositions containing an effect material and a water insoluble thickening agent which is dissolved in a liquid which has no appreciable solvent action on the organic derivative of cellulose present in the fabric; and preferably but not necessarily containing a plasticizer or softening agent to impart suppleness to the film produced from the effect composition.

It has .now been found that not only may increased permanency be imparted to the effects, especially where coloured efifect materials are present in the composition, but that lustrous ef- 5 fects may also be obtained if a solvent for the cellulose derivative in the fabric to be treated be present in the effect composition employed.

According to the present invention, therefore, materials made of or containing cellulose acetate 3 or other organic derivatives of cellulose are treated with effect compositions, said compositions containing an effect material, a water insoluble thickening agent in a medium which has no appreciable solvent action on the organic 35 derivative of cellulose present in the material, and a substance which possesses a solventaction for the organic derivative of cellulose in the material.

The material to be treated in accordance with 40 this invention may contain any organic derivatives of cellulose, e. g. cellulose acetate, cellulose formate, cellulose propionate and cellulose butyrate, and ethyl cellulose, methyl cellulose and benzyl cellulose, and may consist of one or 45 more of these organic derivatives of cellulose or may contain any of these organic derivatives of cellulose inadmixture with other fibres such as silk, cotton, wool, or reconstituted cellulose (rayon). For example the material treated may 50 be a mixed fabric of celluloseacetate and silk or of cellulose acetate and cotton.

For the production of effects the effect composition employed may contain any suitable effect materials, for instance pigments and mineral cf- 55 fectmaterials e. g. barium sulphate, zinc. oxide,

FFlCE rnest Leslie England, asorporation of 1931, Serial fish scales, and/or dyes, par- .n affinity for the orluble materials may for example the ulose derivative, e. g. ether. If cellulose ingredient of the employed in the eff of alcohol and ether, while e. g. ethyl cellulose, are em agents in composi taming cellulo rivatives insolubl or toluene maybe employed.

The effect composition according ent invention contains a vent action on the cellulo r treatment. for example a volatil acetate is present in the mate example, acetone or Further examples of be employed for tree. terials are sulphocyan chlorethylene. The pro effect composition she to cause any considera lose derivative in the ma The effect composition ma ingredients, indee contain a plasticizer. and softening agen to the pressubstance having a s se derivative in the ma- This substance may be e liquid. Where cellulose rial it may be, for

itable solvents which may ting cellulose acetate niaides, ethyl acetate and triportion of solvent in the great enough ble solution of the celluterial treated.

y also contain other able that it should Examples of plasticizers which may be employed henyl phosphate, tricresyl tartrate, diethyl phthalate, mono methyl sulphonamf these plasticizers may be r high boiling sold it is prefer phosphate, dlbutyl triacetin and xylene One or more 0 present, whilst vents may also The composition, dispersion, or paste, may terial by any suitable means.

medium and/o be added to the composition.

for instance a solution, a

be applied to the ma- Thus for example y by printing or spraywhole surface it may be applied locall ing through ste of the material in a bath containing The material may treatment before or after effect composition. Thus ncils, or to the by immersion of the material the composition. be subjected to any desired the application of the for example it may ustred, or otherwise treats the efiect composition. fleets may be obtained on matebe dyed, or del application of ential lustre e any suitable means, such for example, as by rials by applying locally an efiect composition to a delustred material in accordance with the present invention and then subjecting the material to a relustring operation.

The following is an example of a composition which may be employed for stencilling a fabric containing an organic derivative of cellulose in accordance with this invention, but it should be understood that this example is given by way only and is in no way limitative.

A dry dyestuff, for example 1-amino-4-oxy anthraquinone, is carefully ground and incorporated in the following solution to the extent of 1 to 2%, insoluble particles being removed by straining or settling.

Solution Nitrocellulose gm 100 Camphorgm 40-50 Xylene mono methyl sulphonamide (mono oil) cc 200 Acetone and/or methyl ethyl ketone cc 300 Methylated spirit cc 1300 Propyl or butyl acetate cc 1800 The use of propyl acetate as a diluent appears to prevent undue precipitation of the dyestufi and solidification or gel formation in the solution. To apply the above composition locally it may, for example, be sprayed through a stencil on to a fabric consisting of cellulose acetate.

What we claim and desire to secure by Letters Patent is:-

Process for the production of efiects on textile materials containing cellulose acetate, which comprises applying to the materials a composition consisting of an efiect material and a waterinsoluble thickening agent in a medium consisting of the following constituents in approximately the following proportions:

Camphor grams 40 to Xylene monomethyl sulfonamide cc 200 Acetone cc 300 Denatured alcohol cc 1300 Butyl acetate cc 1800 WILLIAM ALEXANDER DICKIE. ERNEST LESLIE GREENWOOD. 

